Superheater-boiler.



J. E. BELL.

SUPERHEATER BOILER. APPLICATION FILED JUNE 3,1907.

925 ,01 6, Patented June 15, 1909.

WITNESSES INVENTOR with mud drums 6 and 7. are connected by pipes 8 and the steam UNITED STATES PATET JOHN E. BELL, OF NEW YORK, N. Y., ASSIGNOR TO THE BABGOGK & WILOOX COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

SUPERHEATER-BOILER.

Specification of Letters Patent.

Patented June 15, 1909.

Application filed June 3, 1907. SerialNo. 376,903.

To all whom it may concern:

Be it known that I, JOHN E. BELL, of New York city, in the county and State of New York, have invented a new anduseful Superheater-Boiler, of which the following is a full, clear, and exact description, reference being had to the accom anying drawings, forming part of this speci cation, in which the figure is a sectional side elevation showing one form of my improved super-heater boiler.

My invention relates to the class of multiple-bank serial-pass water-tube boilers having superheaters within the boiler structure.

. The object of the invention is to rovide a simple and efficient boiler of this 0 aracter.

In the drawings, 2 and 3 represent horizontal transverse steam and water drums con-v nected by banks of straight tubes 4 and 5 The mud drums spaces of the upper drums are connected by t 1e pipes 9. Between and below the drums 2 and 3 are a series of headers 10, connected by water tubes 11 and 12 with the water spaces of the drums 2 and 3. headers two rows of tubes 13 and 14 lead down to the supplemental water drum 15 which is connected by pipes 16 with one of the mud drums, in this case the rear mud drum. Between the rows of tubes 13 and 14 is a transverse baflie 17 having shelves 18.

The furnace 19 for the boiler is of the external type projecting in front of the boiler settin and contains the arch 20 extending over t e combustion chamber. I make this arch hollow and provide a space between it and the roof 21 of "the furnace, this space opening at its front end into the combustion c amber through the port 22, and also opening through port 23 at its rear end into the chamber containing the front bank, of tubes. In this hollow space I place the superheater which I have shown as consisting of U- From these boxes shown as 26 steam is lead through pipe 27 connected to the pipe 28 which is tap ed into both steam and water drums near t eir ends.

29 indicates the outlet for superheated steam from the superheater.

The advantages of my invention result from the location of the superheater over the arch and with a by-pass to allow a small portion of the products of combustion to pass through the space and over the superheating tubes. The amount of superheat may be easily regulated by varying the inlet and outlet ports for the gases.

The form of the superheater may be widely varied, and the form of boiler may be changed so long as it is of the transversedrum, multiple-bank, serial-pass type.-

I claim I 1. A su erheater boiler having transverse steam an water drums connected by banks of tubesto a lower transverse mud drum or drums, a single furnace in front of the boiler having an arch, and a superheater over the arch located in a by-pass for the gases; substantially as described.

2. A su erheater boiler having transverse steam an water drums connected by banks of tubes to a lower transverse mud drum or drums, a single furnace in front of the boiler having an arch, and a superheater over the arch located in a by-Pass for the gases, said superheater consisting of U-shaped' tubes joined to front boxes; substantially as described.

In testimony whereof, I' have hereunto set 

